JP6931462B2 - Waterproof structure - Google Patents

Description

The present disclosure relates to a waterproof structure, and more particularly to a waterproof structure of an instrument device mounted on a vehicle such as a motorcycle.

Generally, an instrument device for measuring a vehicle speed or the like is arranged in front of an occupant of a vehicle such as a two-wheeled vehicle. As one of such instrument devices, an analog type instrument device is known. The analog instrument device forms a housing with an upper case on the occupant (viewer) side and a lower case located behind the upper case when viewed from the occupant. In some cases, a concave groove is provided on the outer circumference of the lower case, a seal member having a circular cross section is inserted into the groove, and the inserted seal member is pressed toward the bottom of the groove by a thickened portion of the upper case. As a conventional technique relating to such a waterproof structure of an instrument, there is a technique disclosed in Patent Document 1.

Japanese Unexamined Patent Publication No. 2011-46292

However, when the upper case and the lower case of the instrument device are fixed with screws, the groove has a bent groove portion that bends because it is necessary to avoid the groove from the screw fixing portion. Then, the seal member is stretched, the wall thickness of the seal member becomes thin, the seal member is biased to the inside of the bent groove portion of the groove, the contact between the thickened portion and the seal member is eccentric, and a sufficient water stopping function cannot be exhibited. There was a problem.

Therefore, the present disclosure has been made in view of the above problems, and provides a waterproof structure capable of improving the watertightness between the upper case and the lower case and reliably preventing water leakage. The purpose is.

The present disclosure crushes the seal member 6 into the groove 53 at a position corresponding to the elastic seal member 6, the first member 1 having the groove 53 for accommodating the seal member 6, and the groove 53. In a waterproof structure composed of a second member 2 having a fitting wall 22 for the purpose, the groove 53 fits the position of the seal member 6 into the corner portion 53c forming the bottom surface 53a and the side surface 53b. The groove 53 has a bent groove portion 533, and the protrusion amount of the protruding portion located in the bent groove portion is the protruding portion located in a position other than the bent groove portion. It is characterized in that it is formed higher than the amount of protrusion of.

The present disclosure crushes the seal member 6 into the groove 53 at a position corresponding to the elastic seal member 6, the first member 1 having the groove 53 for accommodating the seal member 6, and the groove 53. In a waterproof structure composed of a second member 2 having a fitting wall 22 for the purpose, the groove 53 fits the position of the seal member 6 into the corner portion 53c forming the bottom surface 53a and the side surface 53b. The groove 53 has a bent groove portion 533, and the width W2 of the protruding portion 534 located on the inner diameter side of the bent groove portion 533 is the width W2 of the bent groove portion 533. It is characterized in that it is formed wider than the width W1 of the protruding portion located on the outer diameter side.

In the present disclosure, the seal member 6 is crushed into the groove 53 at a position corresponding to the elastic seal member 6, the first member 1 having the groove 53 for accommodating the seal member 6, and the groove 53. In a waterproof structure composed of a second member 2 having a fitting wall 22 for the purpose, the groove 53 fits the position of the seal member 6 into a corner portion 53c forming a bottom surface 53a and a side surface 53b. The protrusion 534 that regulates the position of the joint wall 22 is provided, the groove 53 has a bent groove 533, and the protruding portion 534 located on the inner diameter side of the bent groove 533 is on the outer diameter side of the bent groove 533. It is characterized in that a plurality of the projecting portions 534 that are closer in distance than the projecting portion 534 located in the above are continuously provided.

According to the waterproof structure according to the present disclosure, the watertightness between the upper case and the lower case can be improved, and water leakage can be reliably prevented.

The front view of the vehicle instrument which shows the 1st Embodiment of this disclosure. A cross-sectional view taken along the line AA in FIG. The enlarged view which shows the main part C in FIG. The back view of the upper case shown in arrow B in FIG. The enlarged view which shows the main part D in FIG. FIG. 4 is an enlarged view showing a second embodiment of the present disclosure of the main part D in FIG.

The vehicle instrument 100 according to the embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6. In the explanation, the direction in which the user sitting in the driver's seat of the vehicle is viewed from the vehicle instrument 100 is referred to as "front", and the back side is referred to as "rear".

The first embodiment of the present disclosure is shown in FIGS. 1 to 5. The vehicle instrument 100 is visually recognized from the occupant side and has a substantially quadrangular outer shape, is arranged in front of the occupant, and a display unit 3 for displaying information such as vehicle speed to the occupant is arranged in the center in front of the display unit 3. It is a device including an upper case (first member) 1 that covers the display unit 3 and a lower case (second member) 2 that is located behind the display unit 3 and stores the display unit 3.

The upper case 1 is arranged in front of the display unit 3 and is arranged between the transparent panel 4 that sees through the display unit 3 and the transparent panel 4 and the display unit 3, and surrounds the space between the two in the circumferential direction. It consists of a return of 5.

The transparent panel 4 is made of, for example, a transparent material (for example, a synthetic resin such as acrylic or inorganic glass), and has a function as a covering member for covering the opening 51 of the facing 5. Further, the transparent panel 4 is configured so that the display unit 3 can be visually recognized by the occupant.

The facing 5 is made of an impermeable synthetic resin such as black (for example, polypropylene), surrounds the space between the display unit 3 and the transparent panel 4 in the circumferential direction, and has an opening 51 capable of transmitting the display unit 3. .. Further, the transparent panel 4 and the facing 5 are integrally formed by insert molding or the like.

Further, as shown in FIGS. 2 and 4, the dial 5 has a screw hole 52 into which a screw V, which is a fixing tool such as a screw, is inserted into each corner of the outer shape on the rear surface side. Further, the facing 5 has a groove portion (groove) 53 having a substantially U-shaped (concave) cross section that opens toward the lower case 2 on the outer periphery on the rear surface side.

As shown in FIG. 4, the groove 53 adjacent to the screw hole 52 is arranged along the shape of the screw hole 52 so as to avoid the screw hole 52 so as to pass through the inside of the looking back 5. Further, the groove portion 53 connects the outer peripheral groove portion 531 provided along the outer shape of the facing 5 and the fixed portion groove portion 532 provided along the shape of the screw hole 52, and the outer peripheral groove portion 531 and the fixed portion groove portion 532 to form an outer circumference. It has a bent groove portion 533 that is bent and bent to make the inside continuous. The outer peripheral groove portion 531 is formed in a substantially linear shape. The fixed portion groove portion 532 is formed in a substantially arc shape. The bent groove portion 533 is formed in a substantially arc shape having a radius smaller than that of the fixed portion groove portion 532.

Further, an elastic annular sealing member 6 made of a rubber material or the like is fitted in the groove 53. As shown in FIG. 3A, the seal member 6 is formed to have a substantially circular cross section. Further, as shown in FIG. 3B, the seal member 6 is crushed by the groove portion 53 by the fitting wall 22 described later to seal between the upper case 1 and the lower case 2.

Further, the groove portion 53 has a protruding portion 534 for restricting the position of the seal member 6 to the central position of the bottom surface 53a at the corner forming the bottom surface 53a and the side surface 53b of the groove portion 53. The protrusions 534 are provided in pairs with the seal member 6 interposed therebetween. Further, at least one set of protruding portions 534 is provided in each of the outer peripheral groove portion 531 and the fixed portion groove portion 532 and the bent groove portion 533.

Further, as shown in FIG. 5, the width W2 of the protrusion 534 located on the inner diameter side of the bent groove 533 in the occupant viewing direction is the protrusion 534 and the outer peripheral groove 531 and the fixed portion located on the outer diameter side of the bent groove 533. It is formed wider than the width W1 of the protrusion 534 located in the groove 532, and as a result, comes into contact with the seal member 6 in a larger area than the protrusion 534 located in the fixed groove 532.

Further, the protruding amount H1 of the protruding portion 534 located in the bent groove portion 533 in the occupant viewing direction is formed higher than the protruding amount H2 of the protruding portion 534 located in the outer peripheral groove portion 531 and the fixed portion groove portion 532.

The display unit 3 includes a liquid crystal display 31 provided with a liquid crystal display panel, a backlight unit, a light diffusing plate, a frame body, and the like, and a wiring board 32 arranged behind the liquid crystal display 31, and the speed and operation of the vehicle. -Display vehicle information such as warning lights as an image. The upper case 1 is provided so as to be visible to the occupant through the opening 51.

The wiring board 32 is made of a hard wiring board in which a wiring pattern is applied to a flat glass epoxy-based base material such as FR-4 (Flame Digitalant-4), and is a command signal for driving and controlling the liquid crystal display 31. Various circuit components such as control means, resistors, and capacitors that output the above are conductively connected to the wiring pattern.

The lower case 2 is made of an impermeable synthetic resin such as black (for example, polypropylene), and is formed in a box shape with the front side of the facing 5 open. Further, the lower case 2 houses the display unit 3 inside the box shape. Further, the lower case 2 has a through hole 21 through which the screw V penetrates at a position corresponding to the screw hole 52. Further, a screw V is inserted into the through hole 21 from the rear and fixed to the dial 5. As a result, the vehicle instrument 100 becomes a closed housing by the upper case 1 and the lower case 2.

Further, the lower case 2 has a convex fitting wall 22 for crushing the seal member 6 into the groove 53 at a position corresponding to the groove 53. Similar to the shape of the groove 53, the fitting wall 22 is provided along the outer shape of the facing 5 and is arranged so as to avoid passing through the inside of the screw hole 52.

By being formed in this way, the protruding portion 534 in the bent groove portion 533 abuts on the seal member 6 over a large area, so that the seal member 6 is locally stretched and the wall thickness of the seal member 6 becomes thin. Since it can be prevented, the contact between the fitting wall 22 and the sealing member 6 is ensured, the watertightness between the upper case 1 and the lower case 2 is improved, water leakage is prevented, and a highly commercially available waterproof structure is provided. Can be done.

Further, in the bent groove portion 533, the protruding portion 534 is formed to be higher than the protruding amount H2 of the protruding portion 534 located at the outer peripheral groove portion 531 and the fixed portion groove portion 532, so that the seal member 6 is locally extended and the seal member 6 is formed. Since the central position of the groove 53 can be maintained even if the wall thickness of the groove portion 53 is reduced, the contact between the fitting wall 22 and the sealing member 6 is ensured, and the watertightness between the upper case 1 and the lower case 2 is improved and water is improved. It is possible to prevent leakage and provide a highly commercially available waterproof structure.

Further, by having a fixing tool such as a screw V for fixing the upper case 1 and the lower case 2 at a position adjacent to the fixing portion groove portion 532 and the bending groove portion 533, the fitting wall 22 and the sealing member 6 come into contact with each other. It is possible to ensure that the watertightness between the upper case 1 and the lower case 2 is improved, water leakage is prevented, and a highly commercially available waterproof structure can be provided.

A second embodiment of the present disclosure is shown in FIG. The same parts and equal parts as those in the first embodiment described above will be described with the same reference numerals.

In the first embodiment, the width W2 of the protrusion 534 located on the inner diameter side of the bent groove 533 is formed wider than the width W1 and has a larger area than the protrusion 534 located in the fixed groove 532. Although it was in contact with 6, in the second embodiment, the width W3 of the protrusion 534 is formed to have the same width as the width W1. However, since the plurality of projecting portions 534 are provided in close proximity to each other and continuously provided, they come into contact with the seal member 6 in a larger area than the projecting portions 534 located in the fixed portion groove portion 532.

In the bent groove portion 533, when the protruding portion 534 comes into contact with the seal member 6 over a large area, it is possible to prevent the seal member 6 from being locally stretched and thinning the wall thickness of the seal member 6, so that the fitting wall 22 And the seal member 6 are surely in contact with each other, the watertightness between the upper case 1 and the lower case 2 is improved, water leakage is prevented, and a highly commercially available waterproof structure can be provided.

Although the waterproof structure of the present invention has been described by way of examples in the configuration of the above-described embodiment, the present invention is not limited to this, and other configurations do not deviate from the gist of the present invention. It goes without saying that various improvements and design changes can be made in the above.

For example, the cross section of the groove 53 has a substantially U-shape, but it may be a substantially U-shaped cross section, and the shape does not matter. Further, although the seal member 6 has a substantially circular cross section, it may have a quadrangular cross section, and the shape does not matter.

The present disclosure relates to instruments for vehicles, and can be applied to, for example, a waterproof structure mounted on a moving body including an automobile, a motorcycle, or an agricultural machine or a construction machine.

1 Upper case (first member)
2 Lower case (second member)
21 Through hole (fixed part)
22 Fitting wall 52 Screw hole (fixed part)
53 Groove (groove)
53a Bottom surface 53b Side surface 53c Corner part 533 Bending groove part 534 Protruding part 6 Sealing member
H1 protrusion amount H2 protrusion amount
W1 width
W2 width

Claims (3)

Elastic seal member and
A first member having a groove for accommodating the seal member and
In a waterproof structure composed of a second member having a fitting wall for crushing the seal member into the groove at a position corresponding to the groove.
The groove has a protrusion at a corner forming the bottom surface and the side surface, which regulates the position of the sealing member to the position of the fitting wall.
The groove has a bent bent groove portion, and the protruding amount of the protruding portion located in the bent groove portion is formed to be higher than the protruding amount of the protruding portion located in a position other than the bent groove portion. Waterproof structure. Elastic seal member and
A first member having a groove for accommodating the seal member and
In a waterproof structure composed of a second member having a fitting wall for crushing the seal member into the groove at a position corresponding to the groove.
The groove has a protrusion at a corner forming the bottom surface and the side surface, which regulates the position of the sealing member to the position of the fitting wall.
The groove has a bent bent groove portion, and the width of the protruding portion located on the inner diameter side of the bent groove portion is formed to be wider than the width of the protruding portion located on the outer diameter side of the bent groove portion. Waterproof structure featuring. Elastic seal member and
A first member having a groove for accommodating the seal member and
In a waterproof structure composed of a second member having a fitting wall for crushing the seal member into the groove at a position corresponding to the groove.
The groove has a protrusion at a corner forming the bottom surface and the side surface, which regulates the position of the sealing member to the position of the fitting wall.
The groove has a bent bent groove portion, and the protruding portion located on the inner diameter side of the bent groove portion is a plurality of said protruding portions whose distances are closer than the protruding portion located on the outer diameter side of the bent groove portion. A waterproof structure characterized by being continuously provided.

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